To be fair, he announced the UI update right after the one before, just as he announced the coming Debbie update right after this one - both times before the month even ended, so anybody who doesn't agree could have stoped giving money. After all, it's up to DC to change his mind and it's up to his patrons to stop giving money.
There's really a lot to complain about, but this really pretty much as fair as it gets if you look at it somewhat objectively. Debbie's old art was - rightly so - the major complaint people had. DC/his team seem to have listened, he's fixing it and now people comlain that he didn't stick to his former schedule...